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from the poll - Necromancers, I played as them before switching to Tribes of the East. My favorite hero was Vlad =). But Necromancers are weak, they only rely on numbers. Although, dark magic also helps a lot.
Also, I like Humans - only because of the archers and Vittorio, and Demons, because of the Lords and Daleb.
But I mostly play as Orcs - true power. Of course, with the right hero build. If you make a mistake and leave your units without Fury, a couple of enemy attacks and your army is gone.